point sur une sinusoïde
English translation: a point on a curve
| 11:04 May 1, 2011 |
| French to English translations [PRO] Science - Astronomy & Space | |||||
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|  Selected response from: Terry Richards France Local time: 18:46 | ||||
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| 4 | point of variable luminosity |
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| 3 | a point on a curve |
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| Discussion entries: 1 | |
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Answers
8 mins confidence: 
point of variable luminosity Explanation: BY Draconis variables exhibit variations in their luminosity. Reference: http://en.wikipedia.org/wiki/Gliese_581 |
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3 hrs confidence:
a point on a curve Explanation: The "point" of this somewhat flowery language is that the planet itself is not directly visible. As it orbits its star, it makes the star "wobble" (see reference below) and, by observing this wobble, scientists can determine its likely mass and position. If there was only one planet, this wobble would be a sine wave (in fact, it is a complex curve created from multiple sine waves of different amplitudes and frequencies - one for each planet). Reference: http://en.wikipedia.org/wiki/Doppler_spectroscopy |
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